Injet print head and injet recorder

Abstract

An inkjet print head of an inkjet recorder is provided with a masking plate (or nozzle protecting plate), which is of such configuration as to securely protect the nozzle face against contact and collision with a recording medium and adherence of foreign matter on the recording medium, and to prevent undesired ink droplets from collecting on the masking plate (or nozzle protecting plate) or the nozzle face. The inkjet print head with an assembly of more than one nozzle is designed to be scanned over a cloth while injecting inks from said nozzles onto the cloth to form image patterns on it, and is made up of a nozzle protecting plate mounted on the print head at a given distance from the nozzle face, the nozzle protecting plate having an opening or openings formed as a path or paths for discharge of the inks. The inkjet print head of the present invention can securely protect the nozzle face against contact and collision with a recording medium and adherence of foreign matter on the recording medium to it, irrespective of the arrangement of the nozzles and the type of the recording medium used.

What is claimed is:  
     
       1. An inkjet print head with an assembly of more than one nozzle, designed to be scanned over a cloth while injecting inks from the nozzles onto the cloth to form image patterns on it, comprising a nozzle protecting plate mounted on the print head at a distance of 0.4 to 2.5 mm from the nozzle face, said nozzle protecting plate having more than one slit formed in rows with its longer dimension parallel to the cloth feeding direction as paths for discharge of the inks, the dimension of said slit perpendicular to the cloth feeding direction ranging from 0.4 mm to 1.5 mm, said slit having an area extended downward from the nozzle area, and said nozzle protecting plate having its top and bottom (along the cloth feeding direction) inclined in one or two directions. 
     
     
       2. An inkjet print head with an assembly of more than one nozzle, designed to be scanned over a cloth while injecting inks from the nozzles onto the cloth to form image patterns on it, comprising a nozzle protecting plate mounted on the print head at a given distance from the nozzle face, said nozzle protecting plate having a slit or slits formed with its longer dimension parallel to the cloth feeding direction as a path or paths for discharge of the inks. 
     
     
       3. An inkjet print head as claimed in  claim 2 , wherein two or more of said slits are provided in rows. 
     
     
       4. An inkjet print head as claimed in  claim 2 , wherein said slit has an area extended downward from the nozzle area. 
     
     
       5. An inkjet print head as claimed in  claim 2 , wherein the dimension of said slit perpendicular to the cloth feeding direction ranges from 0.4 mm to 1.5 mm. 
     
     
       6. An inkjet print head with an assembly of more than one nozzle, designed to be scanned over a cloth while injecting inks from the nozzles onto the cloth to form image patterns on it, comprising a nozzle protecting plate mounted on the print head at a given distance from the nozzle face, said nozzle protecting plate having an opening or openings formed as a path of paths for discharge of the inks and the top and bottom of the nozzle protecting plate, along the cloth feeding direction, are inclined in one or more directions. 
     
     
       7. An inkjet print head with an assembly of more than one nozzle, designed to be scanned over a cloth while injecting inks from the nozzles onto the cloth to form image patterns on it, comprising a nozzle protecting plate mounted on the print head at a given distance from the nozzle face, said nozzle protecting plate having an opening or openings formed as a path of paths for discharge of the inks and its surface is treated to have a hydrophilic property.